The Amazon Kindle keyboard features improved crisper and darker fonts, 21% smaller body while keeping the same 6″ size reading area, 15% lighter than previous version (8.7 ounces – less than a paperback), a single charge lasts up to one month with wireless off, doubled the storage (4gb or up to 3,500 Books), built in wifi and Free 3G Wireless (No monthly payments, no annual contract), 20% faster page turns, a more enhanced PDF reader, and a new WebKit-Based browser. This is the ad-free model, so you won’t be bothered with advertisements on your home screen and screensaver.